A few useful words

Word	Meaning in Story Engine
Rule	A possible story moment, with criteria and a list of instructions
Criteria	The conditions used to decide whether a Rule fits
Mandatory	Required. Every enabled mandatory condition must pass
Optional	A detail that adds a point when true without excluding the Rule when false
Story Director	The system that chooses a matching Rule when requested
Category	A name that groups the Rules considered by a request
Global Rule	A Rule with no category, considered alongside named categories
Priority	The importance tier checked before score
Score	The number of passing enabled criteria on an eligible Rule
Fallback	A broadly suitable response for cases where more specific content does not fit
Story history	The record of what the Director has selected, how often and how recently
Bark	A short contextual line, such as a warning, greeting or passing comment
World state	Facts about the game, usually held in variables or other game systems
Rule Trace	The editor's explanation of a Director request and its selection
Story Insights	The editor window for reviewing history and recorded coverage
Actor key	A saved, unique identity for a spawned character's story history

You may also see fuzzy selection used to describe the approach. Here it means that several Rules can partially fit the situation, and the Director ranks the eligible ones. Required conditions still have to pass.